Thanks. I've tried looking them up in some elsets, with uncertain results. In the Molczan file I find stuff like this: GPS 2-13 r1 5.9 2.4 0.0 5.0 v 1 21931U 92019B 98231.18067676 +.00001813 +00000-0 +13391-3 0 00254 2 21931 021.1727 187.0998 0122199 266.8421 091.8045 14.86217478345516 GPS 2-13 r2 3.0 1.5 0.0 6.5 d 1 21932U 92019C 98226.13841358 +.09270531 +19443-6 +67357-3 0 07991 2 21932 034.3319 202.8183 0389043 152.5494 209.5329 15.56434319149659 Are those rocket bodies, or the GPS sats? How do you identify the GPS sats in whatever elsets you use? Is <http://oigsysop.atsc.allied.com/scripts/foxweb.dll/app01?> the right URL for the OIG web site? I've gotten nothing but "broken pipe" errors when trying that tonight. Thanks, Mike